A pyrazolopyridine that is 1<element>H</element>-pyrazolo[3,4-<ital>b</ital>]pyridine which is substituted at positions 1, 4, and 5 by ethyl, 2-isopropylidenehydrazino, and ethoxycarbonyl groups, resp
ectively. A phosphodiesterase IV inhibitor with antidepressant and anxiolytic properties. ChEBICHEBI:138502